/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */

package org.apache.bifromq.util;

/**
 * The constant elements in MQTT Topics and TopicFilters.
 */
public class TopicConst {
    public static final char NUL_CHAR = '\u0000';
    public static final char DELIMITER_CHAR = '/';
    public static final char SINGLE_WILDCARD_CHAR = '+';
    public static final char MULTIPLE_WILDCARD_CHAR = '#';
    public static final String NUL = "\u0000";
    public static final String DELIMITER = "/";
    public static final String SYS_PREFIX = "$";
    public static final String SINGLE_WILDCARD = "+";
    public static final String MULTI_WILDCARD = "#";
    public static final String UNORDERED_SHARE = "$share";
    public static final String ORDERED_SHARE = "$oshare";
}
